Boromir I

[Inziladun]

Originally Posted by Hobbitt_Fan

We do know that Boromir confronted a Nazgul, presumably the Witch King since his life was shortened by a Morgul wound.

That doesn't necessarily mean the wound was the result of single combat between the two. A 'Morgul wound' could indicate the use of a poison, as Orcs were wont to use.
The wording used to decribe the action in taking Osgiliath merely states Boromir defeated the uruks, with no mention of the Nazgûl even being directly involved in the fighting.